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Dr Lucas Erasmus
Dr Lucas Erasmus, Junior Researcher in the Department of Physics, has just returned from Belgium where he had his public defence of a joint PhD with Ghent University, titled: Luminescent solar concentrators – where Sm2+ doped phosphors shine.

“I like taking what I have learned from literature and going to the laboratory to test it. Sometimes the results surprise me, leading to additional experiments or refining. This process could continue for several months and even years, with me slowly building the puzzle. And finally, one day, all the pieces come together, and everything becomes very clear to me as a physicist. And if I am lucky, I will have the privilege of knowing a secret about nature that nobody else has known up to this point. However, as an innovator, I am tasked with using this new knowledge to develop ways to manipulate nature to deliver a helpful device.”

These are the thoughts of Dr Lucas Erasmus, Junior Researcher in the Department of Physics at the University of the Free State (UFS), who has just returned from Ghent, Belgium, where he had his public defence of a joint PhD with Ghent University, titled: Luminescent solar concentrators – where Sm2+ doped phosphors shine.

The research project is part of a bilateral collaboration between the Department of Physics at the UFS and the Department of Solid State Sciences at Ghent University. In this study, the strengths, experience, and resources of both research groups – experienced in developing luminescent materials for various applications – are used to ensure a stronger final product. To meet the requirements stipulated in the cooperation agreement between the two institutions for the joint supervision and certification of Dr Erasmus’ doctoral studies, research was conducted both at the UFS and at Ghent University.

Dr Erasmus’ research is significant in the light of rising energy prices, energy scarcity, and the pursuit of a carbon-free society, where there are strong incentives to develop new and renewable energy sources.

Combining windows and solar cells increase their relevancy in many applications

He says that although solar panels play an essential role in renewable energy – since they provide a route to directly convert solar radiation into electricity – there are limitations to installing conventional panels, which are bulky, rigid, and opaque. He believes that combining windows and solar cells could increase their relevance in the built environment, agricultural sector, and modern consumer electronics.

Explaining about the luminescent solar concentrator (LSC) in his study, he states that it is a device used as a large-area solar radiation collector that converts and emits radiation. The emitted radiation is directed to photovoltaic cells located in the small side area of the device. According to him, a basic LSC consists of a transparent waveguide with an embedded luminescent material and a strategically placed photovoltaic cell on the edge.

Dr Erasmus continues, “The large area of the waveguide collects a portion of the solar radiation, while the luminescent material absorbs the energy and downshifts it to longer wavelengths. Internal reflection directs the emitted photons towards smaller areas on the sides where the photovoltaic cells are used to convert the concentrated light into electricity.”

In his view, creating a large and efficient LSC is a challenging endeavour that requires an in-depth study of multiple domains. “This includes developing and optimising the luminescent material, studying its behaviour and the characteristics of the waveguide, and finally adding these two components and developing, characterising, and simulating the hybrid device,” he remarks.

“While the current prototype we have developed delivers good results, it is still far from perfect and not commercially viable,” he says, stating that this study could, however, serve as a guide for future researchers interested in developing LCSs. Dr Erasmus believes the underlying science behind the results contributes to a general understanding of the materials, making this study valuable to other fields and contributing to the larger body of science. At the end of the study, he also makes some recommendations for future research in this field. 

Study a reflection of theoretical knowledge and a practical system

The public defence consisted of both an internal and an external defence. The internal defence took place in January at the UFS between Dr Erasmus and the examination committee. The external defence occurred at Ghent University and was also open to the broader public. Also present at this event in Belgium were colleagues from the UFS – Prof David Motaung, an examiner; Prof Koos Terblans, co-supervisor; and Prof Hendrik Swart, supervisor for the PhD thesis.

Dr Erasmus’ experience of the oral examination was that the examiners were primarily positive in their critique but also thorough in their questioning. According to him, some of their remarks pointed out that they were impressed with the meticulous planning, execution, and interpretation of the experimental results and that the researchers involved ensured that any parameter that might have influenced the device was maximised. “Moreover, they liked the fact that I went all the way from theoretical knowledge to a practical system. The examiners also noted that the study compares well with the current state-of-the-art research in the field,” adds Dr Erasmus.

He says that having the public defence in Belgium was a once-in-a-lifetime experience, allowing him to interact and deliberate directly with the examiners and communicate their findings and conclusions to the broader public. Dr Erasmus hopes that this will lead to stronger collaboration and better public sentiment toward spending funding for scientific projects.

For future steps, he states, the research group involved in the project plans to continue this research by further increasing the device's efficiency. “To this end, we have already developed another luminescent material that can address some of the challenges we encountered while developing the first prototype device. This forms part of the work that Johané Odendaal is doing in her master’s degree, of which I am a co-supervisor. We also plan to enlarge the scope of our research to consider the challenges that are currently hampering the next generation of photovoltaic cells and to find ways in which we could address these issues,” comments Dr Erasmus.

News Archive

B. Iur. programme in Occupational Risk Law first of its kind in the country
2010-11-26

The University of the Free State (UFS) will offer a B.Iur. degree programme in Occupational Risk Law from 2011.

This programme of the Faculty of Law is the first of its kind to be offered in South Africa and positions the UFS in the forefront of this field of study.

The programme is designed to develop and qualify professionals, knowledgeable in the field of occupational risk law as prescribed by South African legislation and international best practices. It further offers a qualification based on a well-researched basis of applicable legal principles, combined with safety, health, environmental and quality risk management principles applicable to employers and employees in a specialised industry.

The B.Iur. (Occupational Risk Law) has been developed by experts within the parameters of international comparability, according to research-based identification of career demands and requirements in the fields mentioned.

By introducing this programmesignificant progress will be made towards achieving the nationally stated objective of legal safety, health and environmental quality assurance in the workplace and within the broader community. The programme will also encompass the values and standards prescribed by the Institute of Safety Managers. This will provide them with a further step towards the regulation of the professional en ethical standards in the field of legal safety, health and environmental quality assurance.

With the programme, the UFS not only creates a unique opportunity for stakeholders and learners to add meaningful value to their careers, but also exerts a meaningful influence on the industry and society in terms of the acquisition of a most appropriate type of qualification. The B.Iur. (Occupational Risk Law)degree therefore offers a meaningful contribution towards the industry through addressing the increasing demand for career opportunities in the field of legal safety, health and environmental quality compliance.

The new programme is the result of an agreement between the faculty and its partner, IRCA Global. The university officially launched its partnership with IRCA Global, an international supplier of risk management solutions pertaining to safety, health, the environment and quality in 2008. As part of the agreement, the UFS will offer short learning programme, a diploma and a degree in Risk Management.

IRCA Global is a South African company in the international risk control and SHEQ environments with filials in Africa, Australia, India, Eastern Europe, and South America.

In the interim IRCA Global has continued with the marketing of the programme, with the result that hundreds of potential students are waiting for the launching of the programme. The faculty is geared towards offering the programme in e-learning. New modules will also be offered with the help of IRCA’s trained and skilled facilitators. The faculty also utilises the partnerships entered into with IRCA to appoint practising specialists as part-time lecturers for the occupational risk law component of the programme as well as to develop a new specialist component amongst the permanent staff.

The programme is already active and students can register for the first semester 2011 (study code 3324, programme code M3000). Direct your enquiries to Cora-Mari de Vos at 051 401 3532 or devosc@ufs.ac.za.

The programme consists of fundamental modules of the LL.B. and B.Iur., as well as short learning programmes in the Faculty of Law and specially developed core modules in occupational risk law. The B.Iur.in Occupational Risk Law enables successful candidates to enrol for applicable Post Graduate Diplomas or a cognate Honours Degree. Obtaining one of these qualifications provides the platform to articulate to Magister degrees. Horizontal articulation possibilities exist with the accredited Baccalaureus of Law (LL.B.) which is presented by several institutions in the country.

Media Release
Issued by: Lacea Loader
Director: Strategic Communication (actg)
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl@ufs.ac.za
26 November 2010

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